package com.mission.schedule.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class CalendarChange {

	private int year,month,day;
	private boolean leap;
	public static boolean isGetMonth=false;
	private static SimpleDateFormat chineseDateFormat = new SimpleDateFormat("yyyy-MM-dd");
	
	private final static String chineseNumber[] = {"一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二"};
	private final static long[] lunarInfo = new long[]
	{0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2,
	0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2, 0x095b0, 0x14977,
	0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970,
	0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7, 0x0c950,
	0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557,
	0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950, 0x06aa0,
	0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0,
	0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6,
	0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570,
	0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0,
	0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5,
	0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930,
	0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530,
	0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45,
	0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0};	
	
	//====== 传回农历 y年的总天数
	final private static int yearDays(int y) {
		int i, sum = 348;
		for (i = 0x8000; i > 0x8; i >>= 1) {
			if ((lunarInfo[y - 1900] & i) != 0) sum += 1;
		}
		return (sum + leapDays(y));
	}
	//====== 传回农历 y年闰月的天数
	final private static int leapDays(int y) {
		if (leapMonth(y) != 0) {
			if ((lunarInfo[y - 1900] & 0x10000) != 0)
					return 30;
			else
				return 29;
		}else
				return 0;
	}
	//====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
	final private static int leapMonth(int y) {
		return (int) (lunarInfo[y - 1900] & 0xf);
	}
	//====== 传回农历 y年m月的总天数
	final private static int monthDays(int y, int m) {
		if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
		return 29;
			else
		return 30;
    }
	//====== 传回农历 y年的生肖
	final private String animalsYear() {
		final String[] Animals = new String[]{"鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪"};
		return Animals[(year - 4) % 12];
	}
	//====== 传入 月日的offset 传回干支, 0=甲子
	final private static String cyclicalm(int num) {
		final String[] Gan = new String[]{"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"};
		final String[] Zhi = new String[]{"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"};
		return (Gan[num % 10] + Zhi[num % 12]);
	}
	//====== 传入 offset 传回干支, 0=甲子
	final private String cyclical() {
		int num = year - 1900 + 36;
		return (cyclicalm(num));
	}
	/**
	　　* 传出y年m月d日对应的农历.
	　　* yearCyl3:农历年与1864的相差数
	　　* monCyl4:从1900年1月31日以来,闰月数
	　　* dayCyl5:与1900年1月31日相差的天数,再加40
	　　* @param cal
	　　* @return
	　　*/
	private void dateChange(Calendar cal) {
			int yearCyl, monCyl, dayCyl;
			int leapMonth = 0;
			Date baseDate = null;
			try {
				baseDate = chineseDateFormat.parse("1900-1-31");
			} catch (ParseException e) {
					e.printStackTrace();  //To change body of catch statement use Options | File Templates.
			}
			//求出和1900年1月31日相差的天数
			int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);
			dayCyl = offset + 40;
			monCyl = 14;
			//用offset减去每农历年的天数
			// 计算当天是农历第几天
			//i最终结果是农历的年份
			//offset是当年的第几天
			int iYear, daysOfYear = 0;
			for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
				daysOfYear = yearDays(iYear);
				offset -= daysOfYear;
				monCyl += 12;
			}
			if (offset < 0) {
				offset += daysOfYear;
				iYear--;
				monCyl -= 12;
			}
		//农历年份
		year = iYear;
		yearCyl = iYear - 1864;
		leapMonth = leapMonth(iYear); //闰哪个月,1-12
		leap = false;
		//用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天
		int iMonth, daysOfMonth = 0;
		for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {
			//闰月
			if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {
				--iMonth;
				leap = true;
				daysOfMonth = leapDays(year);
			} else
				daysOfMonth = monthDays(year, iMonth);
			offset -= daysOfMonth;
			//解除闰月
			if (leap && iMonth == (leapMonth + 1)) 
					leap = false;
					if (!leap) monCyl++;
		}
		//offset为0时，并且刚才计算的月份是闰月，要校正
		if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
			if (leap) {
					leap = false;
			} else {
				leap = true;
				--iMonth;
				--monCyl;
			}
		}
		//offset小于0时，也要校正
		if (offset < 0) {
			offset += daysOfMonth;
			--iMonth;
			--monCyl;
		}
		month = iMonth;
		day = offset + 1;
	}
	
	private static String getChinaDayString(int day) {
		String chineseTen[] = {"初", "十", "廿", "卅"};
		int n = day % 10 == 0 ? 9 : day % 10 - 1;
		if (day > 30)
			return "";
		
		if (day == 10)
				return "初十";
		else
			return chineseTen[day / 10] + chineseNumber[n];
	}

	/**
	 * 几个主要月份转换
	 * @return
	 */
	private String getToString() {
		String tempMonth="";
		String getMonth=chineseNumber[month-1];
		 String t=	getChinaDayString(day);
		if(getMonth.equals("一")){
			tempMonth="正";
		}else if(getMonth.equals("十一")){
			tempMonth="冬";
		}else if(getMonth.equals("十二")){
			tempMonth="腊";
			
		}else{
			tempMonth=getMonth;
		}
	  
//		if(getChinaDayString(day).equals("初一"))
	   if(t.equals("初一"))
		{
			if(tempMonth.equals("正"))
			{
				t="春节";
			}
			else
			{
				t=tempMonth+"月";
			}
		
		}
	   else if(t.equals("十五"))
	   {
		   if(tempMonth.equals("正"))
			{
				t="元宵节";
			}
		   else if(tempMonth.equals("七"))
			{
				t="中元节";
			}
		   else if(tempMonth.equals("八"))
			{
				t="中秋";
			}
	   }
	   else if(t.equals("初二"))
	   {
		   if(tempMonth.equals("二"))
			{
				t="龙抬头";
			}
	   }
	   else if(t.equals("初五"))
	   {
		   if(tempMonth.equals("五"))
			{
				t="端午节";
			}
	   }
	   else if(t.equals("初九"))
	   {
		   if(tempMonth.equals("五"))
			{
				t="重阳节";
			}
	   }
	   else if(t.equals("初八"))
	   {
		   if(tempMonth.equals("腊"))
			{
				t="腊八节";
			}
	   }
	   else if(t.equals("初七"))
	   {
		   if(tempMonth.equals("七"))
			{
				t="七夕";
			}
	   }
	   else if(t.equals("廿四"))
	   {
		   if(tempMonth.equals("腊"))
			{
				t="小年";
			}
	   }
		if(isGetMonth)
		{
//			return (leap ? "闰" : "") + tempMonth + "月" + getChinaDayString(day);
			return tempMonth+"月"+t;
		}
		else
		{
			return t;
		}
		
//		return (leap ? "闰" : "") + tempMonth + "月" + getChinaDayString(day);
		
//		return 
	}
	/**
	 * 将阳历日期转换为阴历
	 * @param changeDate 2012-1-4
	 * @return 腊月十一
	 * @throws ParseException 日期转换异常
	 */
	public static String CalendarChange(String changeDate) throws ParseException {
		Calendar today = Calendar.getInstance();	
		today.setTime(chineseDateFormat.parse(changeDate));	
		CalendarChange cc = new CalendarChange();	
		cc.dateChange(today);
		return cc.getToString();
	}
	
	
	
}
